[C320-list] Engine compartment sound proofing

Tue Jun 24 07:53:52 PDT 2014

I haven't decided on sound proofing yet. One of the concerns I have is not being able to hear important changes in engine noise (like maladjusted tappets) with sound deadening. Much like having a "quiet" bilge pump or fresh water pump ( I want to hear those when underway should they be activated)  Just a curiosity question. 

Jim Brown

________________________________
 From: Kaare Wold <sailor3952 at charter.net>
To: C320-List at Catalina320.com 
Sent: Monday, June 23, 2014 7:31 PM
Subject: Re: [C320-list] Engine compartment sound proofing

Skippers,  thanks very much for your input!  Your excellent advice and 
experience has certainly provided me with the correct direction to take on 
this project.  Just write another check and go to work.
Kaare & Mary Wold
Sheet Music  #945

----- Original Message ----- 
From: "Jeff Hare" <Catalina at thehares.com>
To: <C320-List at Catalina320.com>
Sent: Monday, June 23, 2014 12:46 PM
Subject: Re: [C320-list] Engine compartment sound proofing

> You really have to do both covers.
>
> Of course choose whatever material you like and report back.
>
> I've seen 3 different installations aside from my own.  One used a 1"
> product from Soundown, one used the West Marine brand (like I did) and one
> used "silent running" paint on product.   The WM and the Soundown products
> looked nearly identical and are all surprisingly heavy and dense.
>
> One installation was really tight and nicely done with no gaps.  The other
> wasn't fit it all that well and left some gaps.  With the well-sealed
> installation I didn't recall hearing any of the diesel knock/pinging, but
> the one with the gaps sounded like it still could use some work to make it
> quieter. The painted on stuff was a joke. No difference to my ear but the
> owner swore it made a difference.   :)
>
> 1) Seriously don't use ceiling tiles. They're not suitable for an engine
> compartment.  They'll be kicking off particles that the intake will suck 
> in.
>
> 2) Try not to use duct tape (or any tape not rated for this application) 
> in
> the engine compartment.  The glues usually won't hold up long term and 
> will
> come off and you'll end up having to "maintain" it, while hoping a piece
> doesn't also get sucked into your intake.
>
> 3) Make sure that whatever product you use will stay stuck.  The West 
> Marine
> product still cannot be peeled loose after 11 years.
>
> 4) Whether you use Tiles or Rolls, make sure you have *no gaps anywhere*,
> otherwise it will not be as quiet as it could be.  This includes where the
> cover meets the walls.
>
> The decision to use the rolls vs tiles came down to ease of installation
> given that both are about identical in the sound department.  With the 
> even
> widths and curved surfaces on the engine covers, the rolled material just
> went on easy in one continuous piece and just a trim here and there on the
> edges to fit with no seams to deal with, no jigsaw puzzle.
>
> Perhaps others who have done the tile installations could post some 
> pictures
> on the C320 site (or send them to myself or David Prudden) to post so that
> people interested in doing this project can have pictures to refer to.
>
> Again, our installation pics are here on the Catalina 320 website:
> Aft cover:  http://tinyurl.com/EngineInsulation1
> Front cover: http://tinyurl.com/EngineInsulation2
>
> Good luck!
> -Jeff Hare
>
> -----Original Message-----
> From: C320-list [mailto:c320-list-bounces at lists.catalina320.com] On Behalf
> Of Kaare Wold
> Sent: Sunday, June 22, 2014 11:22 AM
> To: C320-List at Catalina320.com
> Subject: Re: [C320-list] Engine compartment sound proofing
>
> I am interested in proceeding with this project to quiet down the 
> rattlecan
> Yanmar.  I do have some concerns with using a plain Home Depot ceiling 
> tile
> that is not  designed to function in an enclosed engine environment. 
> Would
> appreciate some feedback on the following question.
> Have you owners insulated just the front engine cover or did you insulate
> both the front and rear?  Thanks for your comments.
> Kaare Wold
> Sheet Music #945
> ----- Original Message -----
> From: "Jeffrey Brown" <oceanblues at mac.com>
> To: <C320-List at Catalina320.com>
> Sent: Thursday, June 19, 2014 6:54 PM
> Subject: Re: [C320-list] Engine compartment sound proofing
>
>
>> Someone on this forum suggest ceiling tiles, which I did and it worked
>> great and cheap.
>>
>> Jeff Brown
>> 949-350-5123
>>
>>> On Jun 19, 2014, at 4:14 PM, Jeff Hare <Catalina at thehares.com> wrote:
>>>
>>> Hi Bill,
>>>
>>> Around 2003 I installed sound proofing in our engine compartment and
>>> it made a big difference.  Mostly it cuts down the harshness and does
>>> drop the volume significantly.  But it won't be "quiet".
>>>
>>> I used the 1" West Marine which is a moderately dense foam with a
>>> lead-like layer in the middle to help hit multiple frequencies.
>>>
>>> I was able to do it in an hour or so.  Even today the adhesive is
>>> showing no signs of letting go.  You peel the backing off and give it
>>> a certain amount of time before you stick it on, but recall it was
>>> quite easy to dry fit and cut with a razor knife.  I purchased the
>>> "kit" which came with some silver seam tape and some metal plates
>>> with pin supports that they say to use for overhead spans, but
>>> they're  not strictly necessary on our engine covers because there is
>>> so little area to support.  I think I used one on the front cover and
>>> none on the aft cover.  Both are fine today.
>>>
>>> Incidentally, if you use 1" on the Front (galley side) engine cover,
>>> the lower pulley may just touch the insulation.  The trick here is to
>>> go ahead and install the cover and run the engine.  It's just the
>>> very bottom of that pulley that might rub just a tiny bit.  When you
>>> stop the engine you'll see if and where it rubs and can either leave
>>> it or carve out a tiny bit.  It really won't hurt anything.  You
>>> won't be able to use anything thicker than 1" on the front.
>>>
>>> Also, if you purchase a roll of the 1/2" version, you can use it to
>>> stick on the fridge side to keep the engine from melting your Ice
>>> Cream.  :)
>>>
>>> If I were to do it again, I'd still go this route.  I considered the
>>> Tiles, but it was a lot more piecing together and more seams.  With
>>> the rolls of stuff, you can cut and install the overhead piece first,
>>> then butt the sides up tight to it and it helps hold the edges in
>>> place.  I cut mine so that each cover just used one single piece
>>> (including the top), so that's an
>>> option too.   The first thing you'll notice is how much heavier the
>>> covers
>>> got.  The second thing is that the harshness is down considerably.
>>>
>>> Avoid the sound deadening paint scam.  It's a joke and doesn't work.
>>>
>>> Two pictures of the Job using the West Marine kit.
>>>
>>> http://tinyurl.com/EngineInsulation1
>>> http://tinyurl.com/EngineInsulation2
>>>
>>> Good luck!
>>>
>>> -Jeff Hare
>>>
>>>
>>> -----Original Message-----
>>> From: C320-list [mailto:c320-list-bounces at lists.catalina320.com] On
>>> Behalf Of Bill Hutt
>>> Sent: Thursday, June 19, 2014 5:53 PM
>>> To: C320-List at Catalina320.com
>>> Subject: [C320-list] Engine compartment sound proofing
>>>
>>> Ok, new thread.
>>> I'm looking at a product from Sailorssolutions.com called SPM. It's 1"
>>> thick
>>> self adhesive tiles. Has anyone tried this with good results?
>>>
>>> Bill Hutt
>>>
>>>
>>> Sent from my iPad=
>>>
> 